GaSb/AlAsSb ‘separate absorption and multiplication avalanche’ photodiodes (SAM-APDs) can be used to selectively detect high-energy electromagnetic x-ray and gamma-ray radiation, according to the University of California, Los Angeles. Its research team has built such detectors, that can observe well-defined X-ray and gamma-ray photo-peaks from an americium 241 source (1.55GBq) at up to 59.5keV with a full-width half-maximum ...
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